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Myocardial scar extent evaluated by cardiac magnetic resonance imaging in ICD patients: relationship to spontaneous VT during long-term follow-up

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Abstract

Patients with ischemic cardiomyopathy have an increased risk for ventricular arrhythmia, since myocardial infarction can be the substrate for re-entrant arrhythmias. Contrast-enhanced cardiac magnetic resonance imaging (CMR) has proven to reliably quantify myocardial infarction. Aim of our study was to evaluate correlations between functional and contrast-enhanced CMR findings and spontaneous ventricular tachy-arrhythmias in patients with ischemic cardiomyopathy who underwent implantable cardioverter-defibrillator (ICD) therapy. Forty-one patients with ischemic cardiomyopathy and indication for ICD therapy underwent cine and late gadolinium enhancement CMR for quantification of left ventricular volumes, function and scar tissue before subsequent implantation of ICD device. During a follow-up period of 1184 ± 442 days 68 monomorphic and 14 polymorphic types of ventricular tachycardia (VT) could be observed in 12 patients. Patients with monomorphic VT had larger scar volumes (25.3 ± 11.3 vs. 11.8 ± 7.5% of myocardial mass, P < 0.05) than patients with polymorphic VT. Moreover myocardial infarction involved more segments in the LAD perfusion territory (86 vs. 20%, P < 0.05) than in patients with polymorphic VT. Patients with spontaneous monomorphic VT during the long-term follow-up period had more infarcted tissue, which was more often present in the LAD perfusion territory than patients with polymorphic events. These data strengthen the diagnostic benefit of CMR in patients with ischemic cardiomyopathy. CMR may be used for better risk stratification in patients with ischemic cardiomyopathy undergoing ICD therapy.

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Authors and Affiliations

  1. Department of Internal Medicine II, University of Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany

    Peter Bernhardt, Sascha Stiller, Eva Kottmair, Ludwig Binner, Jochen Spieß, Georg Großmann, Volker Rasche, Daniel Walcher & Vinzenz Hombach

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  1. Peter Bernhardt
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  2. Sascha Stiller
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  3. Eva Kottmair
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  4. Ludwig Binner
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  5. Jochen Spieß
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  6. Georg Großmann
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  7. Volker Rasche
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  8. Daniel Walcher
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  9. Vinzenz Hombach
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Correspondence to Peter Bernhardt.

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Peter Bernhardt and Sascha Stiller authors contributed equally to the manuscript.

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Bernhardt, P., Stiller, S., Kottmair, E. et al. Myocardial scar extent evaluated by cardiac magnetic resonance imaging in ICD patients: relationship to spontaneous VT during long-term follow-up. Int J Cardiovasc Imaging 27, 893–900 (2011). https://doi.org/10.1007/s10554-010-9726-9

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  • DOI: https://doi.org/10.1007/s10554-010-9726-9

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